UtilityKit

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DNS Lookup Tool

Query public DNS records with SSRF-safe hostname validation

About DNS Lookup Tool

DNS Lookup routes resolver queries through UtilityKit's backend after validating that hostnames cannot pivot into your internal network. Grab A/AAAA targets for migration cutovers, inspect MX rows before email go-live, or dump TXT proofs for certificate issuance — every response arrives as readable JSON suitable for screenshots or tickets.

Why use DNS Lookup Tool

  • Verify propagation without installing dig locally.
  • Shareable workflow that respects SSRF protections.
  • Pairs well with HTTP header and TLS inspectors on the same checklist.

How to use DNS Lookup Tool

  1. Type a hostname without http:// or trailing slash.
  2. Choose record type (A, AAAA, MX, TXT, NS, or CNAME).
  3. Run lookup and read structured JSON results.

When to use DNS Lookup Tool

  • Checking TXT verification tokens during TLS issuance.
  • Confirming MX priorities after DNS edits.
  • Teaching networking basics without granting trainees shell access.

Frequently Asked Questions

Which record types are supported?

A, AAAA, MX, TXT, NS, and CNAME queries run through Node's resolver.

Why server-side?

Browsers cannot issue arbitrary DNS queries; UtilityKit proxies lookups through hardened validation.

Are internal hosts allowed?

No — hosts resolving to private or restricted addresses are rejected.

Does this replace enterprise DNS monitoring?

No — it is a quick diagnostic aid, not authoritative monitoring.

Is DNS Lookup free?

Yes — no account needed.

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